Laminated light-polarizing sheet

Abstract

A laminated light-polarizing sheet having an excellent humidity resistance with dimensional stability under a high humidity as well as an excellent light resistance comprising a light-polarizing film of a halogenated vinyl or vinylidene polymer containing polyene chains formed by partial dehydrohalogenation and a film or sheet of an acrylate or methacrylate polymer laminated on at least one surface of the light-polarizing film.

What is claimed is: 
     
       1. A laminated light-polarizing sheet comprising a light-polarizing film of a halogenated vinyl or vinylidene polymer containing polyene chains formed by partial dehydrohalogenation, said chains being oriented by stretching, and a film or sheet of an acrylate of methacrylate polymer laminated on at least one surface of the light-polarizing film. 
     
     
       2. A laminated light-polarizing sheet according to claim 1, wherein the film or sheet is laminated on the surface of the light-polarizing film with an adhesive. 
     
     
       3. A laminated light-polarizing sheet according to claim 1, wherein the film or sheet is directly laminated on the surface of the light-polarizing film. 
     
     
       4. A laminated light-polarizing sheet according to claim 1, wherein said sheet has a light transmittance of not less than 60% within the wavelength range of 500 to 800 mμ and of not more than 10% within the wavelength range of 230 to 420 mμ. 
     
     
       5. A laminated light-polarizing sheet according to claim 1, wherein a pressure sensitive adhesive layer covered by a release film is further provided on at least one surface of the laminated light-polarizing sheet. 
     
     
       6. A laminated light-polarizing sheet according to claim 1, wherein a reflex plate is further laminated on either surface of the laminated light-polarizing sheet. 
     
     
       7. A laminated light-polarizing sheet according to claim 6, wherein a pressure sensitive adhesive layer covered by a release film is further provided on at least one surface of the laminated light-polarizing sheet. 
     
     
       8. A laminated light-polarizing sheet according to claim 1, wherein the film or sheet is that of a homopolymer or a copolymer of a monomer of the formula: ##STR5## in which R is hydrogen or an alkyl group having 1 to 10 carbon atoms; and R 9  is an alkyl group, a halosubstituted alkyl group or an alkyl group whose chain is interrupted with O, N, or S, each alkyl group having 1 to 10 carbon atoms, a cycloalkyl or bicycloalkyl group having 5 to 10 carbon atoms, an aryl group or halosubstituted aryl group having 6 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms or a heterocyclic group containing one or more hetero atom selected from O, N and S. 
     
     
       9. A laminated light-polarizing sheet according to claim 1, wherein the film or sheet is that of a copolymer of the monomer of the formula: ##STR6## in which R 8  is hydrogen or an alkyl having 1 to 10 carbon atoms; and R 9  is an alkyl group, a halosubstituted alkyl group or an alkyl group whose chain is interrupted with O, N, or S, each alkyl group having 1 to 10 carbon atoms, a cycloalkyl or bicycloalkyl group having 5 to 10 carbon atoms, an aryl group or halosubstituted aryl group having 6 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms or a heterocyclic group containing one or more hetero atom selected from O, N and S; said copolymer containing up to 50 mol % (based on all the structural units of the polymer) of another copolymerized copolymerizable monomer of the formula: ##STR7## in which R 10  is hydrogen or an alkyl group having 1 to 10 carbon atoms; and R 11  is an unsubstituted, hydroxyl substituted or halogen substituted alkyl group or alkyl group interrupted by O, N or S, each having 1 to 10 carbon atoms, aryl group having 6 to 10 carbon atoms, cycloalkyl or bicycloalkyl group having 5 to 10 carbon atoms, or heterocyclic group having at least one hetero atom selected from O, N and S; --CN, --OH or --OOCR 12  ; where R 12  is an alkyl group or aN alkyl group interrupted with O, N, S, or --COO--, each having 1 to 10 carbon atoms. 
     
     
       10. A laminated light-polarizing sheet according to claim 8 wherein R 9  is alkyl. 
     
     
       11. A laminated light-polarizing sheet according to claim 8 wherein R 8  and R 9  are halogen substituted alkyl or aryl. 
     
     
       12. A laminated light-polarizing sheet according to claim 9 wherein R 9  is alkyl. 
     
     
       13. A laminated light-polarizing sheet according to claim 9 wherein the alkyl and aryl groups are halogen substituted.